My two oldest gosling(about 3 months old) wings started sagging. The older one just has one wing sagging but the other has both sagging and I have a few younger ones that I would like to prevent this from happening to. I'm pretty sure since its more then one gosling it is something I am doing wrong. They have been on flockraiser since they hatched. Actually they where on chick starter the first week or two but flock raiser after that. They are now on grass full time and that's when they started to sag. It has been raining alot lately. Should I change them to adult goose feed. I feed either pennfields waterfowl pellets or hubbards duck and goose and a few handfuls of BOSS. I just want to know what I should change and what I can do to fix what had already been done.